net: hns3: modify timing of reading register in hclge_reset_wait()

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

In order to get register status earlier, this patch modifies the code
timing to read register firstly and then go to sleep to wait.

Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Reviewed-by: Peng Li <lipeng321@huawei.com>
Reviewed-by: Zhong Zhaohui <zhongzhaohui@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>